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.. SPDX-License-Identifier: GPL-2.0
=============== ARCnet Hardware =============== .. note:: 1) This file is a supplement to arcnet.txt. Please read that for general driver configuration help. 2) This file is no longer Linux-specific. It should probably be moved out of the kernel sources. Ideas? Because so many people (myself included) seem to have obtained ARCnet cards without manuals, this file contains a quick introduction to ARCnet hardware, some cabling tips, and a listing of all jumper settings I can find. Please e-mail apenwarr@worldvisions.ca with any settings for your particular card, or any other information you have! Introduction to ARCnet ====================== ARCnet is a network type which works in a way similar to popular Ethernet networks but which is also different in some very important ways. First of all, you can get ARCnet cards in at least two speeds: 2.5 Mbps (slower than Ethernet) and 100 Mbps (faster than normal Ethernet). In fact, there are others as well, but these are less common. The different hardware types, as far as I'm aware, are not compatible and so you cannot wire a 100 Mbps card to a 2.5 Mbps card, and so on. From what I hear, my driver does work with 100 Mbps cards, but I haven't been able to verify this myself, since I only have the 2.5 Mbps variety. It is probably not going to saturate your 100 Mbps card. Stop complaining. :) You also cannot connect an ARCnet card to any kind of Ethernet card and expect it to work. There are two "types" of ARCnet - STAR topology and BUS topology. This refers to how the cards are meant to be wired together. According to most available documentation, you can only connect STAR cards to STAR cards and BUS cards to BUS cards. That makes sense, right? Well, it's not quite true; see below under "Cabling." Once you get past these little stumbling blocks, ARCnet is actually quite a well-designed standard. It uses something called "modified token passing" which makes it completely incompatible with so-called "Token Ring" cards, but which makes transfers much more reliable than Ethernet does. In fact, ARCnet will guarantee that a packet arrives safely at the destination, and even if it can't possibly be delivered properly (ie. because of a cable break, or because the destination computer does not exist) it will at least tell the sender about it. Because of the carefully defined action of the "token", it will always make a pass around the "ring" within a maximum length of time. This makes it useful for realtime networks. In addition, all known ARCnet cards have an (almost) identical programming interface. This means that with one ARCnet driver you can support any card, whereas with Ethernet each manufacturer uses what is sometimes a completely different programming interface, leading to a lot of different, sometimes very similar, Ethernet drivers. Of course, always using the same programming interface also means that when high-performance hardware facilities like PCI bus mastering DMA appear, it's hard to take advantage of them. Let's not go into that. One thing that makes ARCnet cards difficult to program for, however, is the limit on their packet sizes; standard ARCnet can only send packets that are up to 508 bytes in length. This is smaller than the Internet "bare minimum" of 576 bytes, let alone the Ethernet MTU of 1500. To compensate, an extra level of encapsulation is defined by RFC1201, which I call "packet splitting," that allows "virtual packets" to grow as large as 64K each, although they are generally kept down to the Ethernet-style 1500 bytes. For more information on the advantages and disadvantages (mostly the advantages) of ARCnet networks, you might try the "ARCnet Trade Association" WWW page: http://www.arcnet.com Cabling ARCnet Networks ======================= This section was rewritten by Vojtech Pavlik <vojtech@suse.cz> using information from several people, including: - Avery Pennraun <apenwarr@worldvisions.ca> - Stephen A. Wood <saw@hallc1.cebaf.gov> - John Paul Morrison <jmorriso@bogomips.ee.ubc.ca> - Joachim Koenig <jojo@repas.de> and Avery touched it up a bit, at Vojtech's request. ARCnet (the classic 2.5 Mbps version) can be connected by two different types of cabling: coax and twisted pair. The other ARCnet-type networks (100 Mbps TCNS and 320 kbps - 32 Mbps ARCnet Plus) use different types of cabling (Type1, Fiber, C1, C4, C5). For a coax network, you "should" use 93 Ohm RG-62 cable. But other cables also work fine, because ARCnet is a very stable network. I personally use 75 Ohm TV antenna cable. Cards for coax cabling are shipped in two different variants: for BUS and STAR network topologies. They are mostly the same. The only difference lies in the hybrid chip installed. BUS cards use high impedance output, while STAR use low impedance. Low impedance card (STAR) is electrically equal to a high impedance one with a terminator installed. Usually, the ARCnet networks are built up from STAR cards and hubs. There are two types of hubs - active and passive. Passive hubs are small boxes with four BNC connectors containing four 47 Ohm resistors:: | | wires R + junction -R-+-R- R 47 Ohm resistors R | The shielding is connected together. Active hubs are much more complicated; they are powered and contain electronics to amplify the signal and send it to other segments of the net. They usually have eight connectors. Active hubs come in two variants - dumb and smart. The dumb variant just amplifies, but the smart one decodes to digital and encodes back all packets coming through. This is much better if you have several hubs in the net, since many dumb active hubs may worsen the signal quality. And now to the cabling. What you can connect together: 1. A card to a card. This is the simplest way of creating a 2-computer network. 2. A card to a passive hub. Remember that all unused connectors on the hub must be properly terminated with 93 Ohm (or something else if you don't have the right ones) terminators. (Avery's note: oops, I didn't know that. Mine (TV cable) works anyway, though.) 3. A card to an active hub. Here is no need to terminate the unused connectors except some kind of aesthetic feeling. But, there may not be more than eleven active hubs between any two computers. That of course doesn't limit the number of active hubs on the network. 4. An active hub to another. 5. An active hub to passive hub. Remember that you cannot connect two passive hubs together. The power loss implied by such a connection is too high for the net to operate reliably. An example of a typical ARCnet network:: R S - STAR type card S------H--------A-------S R - Terminator | | H - Hub | | A - Active hub | S----H----S S | | S The BUS topology is very similar to the one used by Ethernet. The only difference is in cable and terminators: they should be 93 Ohm. Ethernet uses 50 Ohm impedance. You use T connectors to put the computers on a single line of cable, the bus. You have to put terminators at both ends of the cable. A typical BUS ARCnet network looks like:: RT----T------T------T------T------TR B B B B B B B - BUS type card R - Terminator T - T connector But that is not all! The two types can be connected together. According to the official documentation the only way of connecting them is using an active hub:: A------T------T------TR | B B B S---H---S | S The official docs also state that you can use STAR cards at the ends of BUS network in place of a BUS card and a terminator:: S------T------T------S B B But, according to my own experiments, you can simply hang a BUS type card anywhere in middle of a cable in a STAR topology network. And more - you can use the bus card in place of any star card if you use a terminator. Then you can build very complicated networks fulfilling all your needs! An example:: S | RT------T-------T------H------S B B B | | R S------A------T-------T-------A-------H------TR | B B | | B | S BT | | | | S----A-----S S------H---A----S | | | | S------T----H---S | S S B R S A basically different cabling scheme is used with Twisted Pair cabling. Each of the TP cards has two RJ (phone-cord style) connectors. The cards are then daisy-chained together using a cable connecting every two neighboring cards. The ends are terminated with RJ 93 Ohm terminators which plug into the empty connectors of cards on the ends of the chain. An example:: ___________ ___________ _R_|_ _|_|_ _|_R_ | | | | | | |Card | |Card | |Card | |_____| |_____| |_____| There are also hubs for the TP topology. There is nothing difficult involved in using them; you just connect a TP chain to a hub on any end or even at both. This way you can create almost any network configuration. The maximum of 11 hubs between any two computers on the net applies here as well. An example:: RP-------P--------P--------H-----P------P-----PR | RP-----H--------P--------H-----P------PR | | PR PR R - RJ Terminator P - TP Card H - TP Hub Like any network, ARCnet has a limited cable length. These are the maximum cable lengths between two active ends (an active end being an active hub or a STAR card). ========== ======= =========== RG-62 93 Ohm up to 650 m RG-59/U 75 Ohm up to 457 m RG-11/U 75 Ohm up to 533 m IBM Type 1 150 Ohm up to 200 m IBM Type 3 100 Ohm up to 100 m ========== ======= =========== The maximum length of all cables connected to a passive hub is limited to 65 meters for RG-62 cabling; less for others. You can see that using passive hubs in a large network is a bad idea. The maximum length of a single "BUS Trunk" is about 300 meters for RG-62. The maximum distance between the two most distant points of the net is limited to 3000 meters. The maximum length of a TP cable between two cards/hubs is 650 meters. Setting the Jumpers =================== All ARCnet cards should have a total of four or five different settings: - the I/O address: this is the "port" your ARCnet card is on. Probed values in the Linux ARCnet driver are only from 0x200 through 0x3F0. (If your card has additional ones, which is possible, please tell me.) This should not be the same as any other device on your system. According to a doc I got from Novell, MS Windows prefers values of 0x300 or more, eating net connections on my system (at least) otherwise. My guess is this may be because, if your card is at 0x2E0, probing for a serial port at 0x2E8 will reset the card and probably mess things up royally. - Avery's favourite: 0x300. - the IRQ: on 8-bit cards, it might be 2 (9), 3, 4, 5, or 7. on 16-bit cards, it might be 2 (9), 3, 4, 5, 7, or 10-15. Make sure this is different from any other card on your system. Note that IRQ2 is the same as IRQ9, as far as Linux is concerned. You can "cat /proc/interrupts" for a somewhat complete list of which ones are in use at any given time. Here is a list of common usages from Vojtech Pavlik <vojtech@suse.cz>: ("Not on bus" means there is no way for a card to generate this interrupt) ====== ========================================================= IRQ 0 Timer 0 (Not on bus) IRQ 1 Keyboard (Not on bus) IRQ 2 IRQ Controller 2 (Not on bus, nor does interrupt the CPU) IRQ 3 COM2 IRQ 4 COM1 IRQ 5 FREE (LPT2 if you have it; sometimes COM3; maybe PLIP) IRQ 6 Floppy disk controller IRQ 7 FREE (LPT1 if you don't use the polling driver; PLIP) IRQ 8 Realtime Clock Interrupt (Not on bus) IRQ 9 FREE (VGA vertical sync interrupt if enabled) IRQ 10 FREE IRQ 11 FREE IRQ 12 FREE IRQ 13 Numeric Coprocessor (Not on bus) IRQ 14 Fixed Disk Controller IRQ 15 FREE (Fixed Disk Controller 2 if you have it) ====== ========================================================= .. note:: IRQ 9 is used on some video cards for the "vertical retrace" interrupt. This interrupt would have been handy for things like video games, as it occurs exactly once per screen refresh, but unfortunately IBM cancelled this feature starting with the original VGA and thus many VGA/SVGA cards do not support it. For this reason, no modern software uses this interrupt and it can almost always be safely disabled, if your video card supports it at all. If your card for some reason CANNOT disable this IRQ (usually there is a jumper), one solution would be to clip the printed circuit contact on the board: it's the fourth contact from the left on the back side. I take no responsibility if you try this. - Avery's favourite: IRQ2 (actually IRQ9). Watch that VGA, though. - the memory address: Unlike most cards, ARCnets use "shared memory" for copying buffers around. Make SURE it doesn't conflict with any other used memory in your system! :: A0000 - VGA graphics memory (ok if you don't have VGA) B0000 - Monochrome text mode C0000 \ One of these is your VGA BIOS - usually C0000. E0000 / F0000 - System BIOS Anything less than 0xA0000 is, well, a BAD idea since it isn't above 640k. - Avery's favourite: 0xD0000 - the station address: Every ARCnet card has its own "unique" network address from 0 to 255. Unlike Ethernet, you can set this address yourself with a jumper or switch (or on some cards, with special software). Since it's only 8 bits, you can only have 254 ARCnet cards on a network. DON'T use 0 or 255, since these are reserved (although neat stuff will probably happen if you DO use them). By the way, if you haven't already guessed, don't set this the same as any other ARCnet on your network! - Avery's favourite: 3 and 4. Not that it matters. - There may be ETS1 and ETS2 settings. These may or may not make a difference on your card (many manuals call them "reserved"), but are used to change the delays used when powering up a computer on the network. This is only necessary when wiring VERY long range ARCnet networks, on the order of 4km or so; in any case, the only real requirement here is that all cards on the network with ETS1 and ETS2 jumpers have them in the same position. Chris Hindy <chrish@io.org> sent in a chart with actual values for this: ======= ======= =============== ==================== ET1 ET2 Response Time Reconfiguration Time ======= ======= =============== ==================== open open 74.7us 840us open closed 283.4us 1680us closed open 561.8us 1680us closed closed 1118.6us 1680us ======= ======= =============== ==================== Make sure you set ETS1 and ETS2 to the SAME VALUE for all cards on your network. Also, on many cards (not mine, though) there are red and green LED's. Vojtech Pavlik <vojtech@suse.cz> tells me this is what they mean: =============== =============== ===================================== GREEN RED Status =============== =============== ===================================== OFF OFF Power off OFF Short flashes Cabling problems (broken cable or not terminated) OFF (short) ON Card init ON ON Normal state - everything OK, nothing happens ON Long flashes Data transfer ON OFF Never happens (maybe when wrong ID) =============== =============== ===================================== The following is all the specific information people have sent me about their own particular ARCnet cards. It is officially a mess, and contains huge amounts of duplicated information. I have no time to fix it. If you want to, PLEASE DO! Just send me a 'diff -u' of all your changes. The model # is listed right above specifics for that card, so you should be able to use your text viewer's "search" function to find the entry you want. If you don't KNOW what kind of card you have, try looking through the various diagrams to see if you can tell. If your model isn't listed and/or has different settings, PLEASE PLEASE tell me. I had to figure mine out without the manual, and it WASN'T FUN! Even if your ARCnet model isn't listed, but has the same jumpers as another model that is, please e-mail me to say so. Cards Listed in this file (in this order, mostly): =============== ======================= ==== Manufacturer Model # Bits =============== ======================= ==== SMC PC100 8 SMC PC110 8 SMC PC120 8 SMC PC130 8 SMC PC270E 8 SMC PC500 16 SMC PC500Longboard 16 SMC PC550Longboard 16 SMC PC600 16 SMC PC710 8 SMC? LCS-8830(-T) 8/16 Puredata PDI507 8 CNet Tech CN120-Series 8 CNet Tech CN160-Series 16 Lantech? UM9065L chipset 8 Acer 5210-003 8 Datapoint? LAN-ARC-8 8 Topware TA-ARC/10 8 Thomas-Conrad 500-6242-0097 REV A 8 Waterloo? (C)1985 Waterloo Micro. 8 No Name -- 8/16 No Name Taiwan R.O.C? 8 No Name Model 9058 8 Tiara Tiara Lancard? 8 =============== ======================= ==== * SMC = Standard Microsystems Corp. * CNet Tech = CNet Technology, Inc. Unclassified Stuff ================== - Please send any other information you can find. - And some other stuff (more info is welcome!):: From: root@ultraworld.xs4all.nl (Timo Hilbrink) To: apenwarr@foxnet.net (Avery Pennarun) Date: Wed, 26 Oct 1994 02:10:32 +0000 (GMT) Reply-To: timoh@xs4all.nl [...parts deleted...] About the jumpers: On my PC130 there is one more jumper, located near the cable-connector and it's for changing to star or bus topology; closed: star - open: bus On the PC500 are some more jumper-pins, one block labeled with RX,PDN,TXI and another with ALE,LA17,LA18,LA19 these are undocumented.. [...more parts deleted...] --- CUT --- Standard Microsystems Corp (SMC) ================================ PC100, PC110, PC120, PC130 (8-bit cards) and PC500, PC600 (16-bit cards) ------------------------------------------------------------------------ - mainly from Avery Pennarun <apenwarr@worldvisions.ca>. Values depicted are from Avery's setup. - special thanks to Timo Hilbrink <timoh@xs4all.nl> for noting that PC120, 130, 500, and 600 all have the same switches as Avery's PC100. PC500/600 have several extra, undocumented pins though. (?) - PC110 settings were verified by Stephen A. Wood <saw@cebaf.gov> - Also, the JP- and S-numbers probably don't match your card exactly. Try to find jumpers/switches with the same number of settings - it's probably more reliable. :: JP5 [|] : : : : (IRQ Setting) IRQ2 IRQ3 IRQ4 IRQ5 IRQ7 Put exactly one jumper on exactly one set of pins. 1 2 3 4 5 6 7 8 9 10 S1 /----------------------------------\ (I/O and Memory | 1 1 * 0 0 0 0 * 1 1 0 1 | addresses) \----------------------------------/ |--| |--------| |--------| (a) (b) (m) WARNING. It's very important when setting these which way you're holding the card, and which way you think is '1'! If you suspect that your settings are not being made correctly, try reversing the direction or inverting the switch positions. a: The first digit of the I/O address. Setting Value ------- ----- 00 0 01 1 10 2 11 3 b: The second digit of the I/O address. Setting Value ------- ----- 0000 0 0001 1 0010 2 ... ... 1110 E 1111 F The I/O address is in the form ab0. For example, if a is 0x2 and b is 0xE, the address will be 0x2E0. DO NOT SET THIS LESS THAN 0x200!!!!! m: The first digit of the memory address. Setting Value ------- ----- 0000 0 0001 1 0010 2 ... ... 1110 E 1111 F The memory address is in the form m0000. For example, if m is D, the address will be 0xD0000. DO NOT SET THIS TO C0000, F0000, OR LESS THAN A0000! 1 2 3 4 5 6 7 8 S2 /--------------------------\ (Station Address) | 1 1 0 0 0 0 0 0 | \--------------------------/ Setting Value ------- ----- 00000000 00 10000000 01 01000000 02 ... 01111111 FE 11111111 FF Note that this is binary with the digits reversed! DO NOT SET THIS TO 0 OR 255 (0xFF)! PC130E/PC270E (8-bit cards) --------------------------- - from Juergen Seifert <seifert@htwm.de> This description has been written by Juergen Seifert <seifert@htwm.de> using information from the following Original SMC Manual "Configuration Guide for ARCNET(R)-PC130E/PC270 Network Controller Boards Pub. # 900.044A June, 1989" ARCNET is a registered trademark of the Datapoint Corporation SMC is a registered trademark of the Standard Microsystems Corporation The PC130E is an enhanced version of the PC130 board, is equipped with a standard BNC female connector for connection to RG-62/U coax cable. Since this board is designed both for point-to-point connection in star networks and for connection to bus networks, it is downwardly compatible with all the other standard boards designed for coax networks (that is, the PC120, PC110 and PC100 star topology boards and the PC220, PC210 and PC200 bus topology boards). The PC270E is an enhanced version of the PC260 board, is equipped with two modular RJ11-type jacks for connection to twisted pair wiring. It can be used in a star or a daisy-chained network. :: 8 7 6 5 4 3 2 1 ________________________________________________________________ | | S1 | | | |_________________| | | Offs|Base |I/O Addr | | RAM Addr | ___| | ___ ___ CR3 |___| | | \/ | CR4 |___| | | PROM | ___| | | | N | | 8 | | SOCKET | o | | 7 | |________| d | | 6 | ___________________ e | | 5 | | | A | S | 4 | |oo| EXT2 | | d | 2 | 3 | |oo| EXT1 | SMC | d | | 2 | |oo| ROM | 90C63 | r |___| 1 | |oo| IRQ7 | | |o| _____| | |oo| IRQ5 | | |o| | J1 | | |oo| IRQ4 | | STAR |_____| | |oo| IRQ3 | | | J2 | | |oo| IRQ2 |___________________| |_____| |___ ______________| | | |_____________________________________________| Legend:: SMC 90C63 ARCNET Controller / Transceiver /Logic S1 1-3: I/O Base Address Select 4-6: Memory Base Address Select 7-8: RAM Offset Select S2 1-8: Node ID Select EXT Extended Timeout Select ROM ROM Enable Select STAR Selected - Star Topology (PC130E only) Deselected - Bus Topology (PC130E only) CR3/CR4 Diagnostic LEDs J1 BNC RG62/U Connector (PC130E only) J1 6-position Telephone Jack (PC270E only) J2 6-position Telephone Jack (PC270E only) Setting one of the switches to Off/Open means "1", On/Closed means "0". Setting the Node ID ^^^^^^^^^^^^^^^^^^^ The eight switches in group S2 are used to set the node ID. These switches work in a way similar to the PC100-series cards; see that entry for more information. Setting the I/O Base Address ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The first three switches in switch group S1 are used to select one of eight possible I/O Base addresses using the following table:: Switch | Hex I/O 1 2 3 | Address -------|-------- 0 0 0 | 260 0 0 1 | 290 0 1 0 | 2E0 (Manufacturer's default) 0 1 1 | 2F0 1 0 0 | 300 1 0 1 | 350 1 1 0 | 380 1 1 1 | 3E0 Setting the Base Memory (RAM) buffer Address ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The memory buffer requires 2K of a 16K block of RAM. The base of this 16K block can be located in any of eight positions. Switches 4-6 of switch group S1 select the Base of the 16K block. Within that 16K address space, the buffer may be assigned any one of four positions, determined by the offset, switches 7 and 8 of group S1. :: Switch | Hex RAM | Hex ROM 4 5 6 7 8 | Address | Address *) -----------|---------|----------- 0 0 0 0 0 | C0000 | C2000 0 0 0 0 1 | C0800 | C2000 0 0 0 1 0 | C1000 | C2000 0 0 0 1 1 | C1800 | C2000 | | 0 0 1 0 0 | C4000 | C6000 0 0 1 0 1 | C4800 | C6000 0 0 1 1 0 | C5000 | C6000 0 0 1 1 1 | C5800 | C6000 | | 0 1 0 0 0 | CC000 | CE000 0 1 0 0 1 | CC800 | CE000 0 1 0 1 0 | CD000 | CE000 0 1 0 1 1 | CD800 | CE000 | | 0 1 1 0 0 | D0000 | D2000 (Manufacturer's default) 0 1 1 0 1 | D0800 | D2000 0 1 1 1 0 | D1000 | D2000 0 1 1 1 1 | D1800 | D2000 | | 1 0 0 0 0 | D4000 | D6000 1 0 0 0 1 | D4800 | D6000 1 0 0 1 0 | D5000 | D6000 1 0 0 1 1 | D5800 | D6000 | | 1 0 1 0 0 | D8000 | DA000 1 0 1 0 1 | D8800 | DA000 1 0 1 1 0 | D9000 | DA000 1 0 1 1 1 | D9800 | DA000 | | 1 1 0 0 0 | DC000 | DE000 1 1 0 0 1 | DC800 | DE000 1 1 0 1 0 | DD000 | DE000 1 1 0 1 1 | DD800 | DE000 | | 1 1 1 0 0 | E0000 | E2000 1 1 1 0 1 | E0800 | E2000 1 1 1 1 0 | E1000 | E2000 1 1 1 1 1 | E1800 | E2000 *) To enable the 8K Boot PROM install the jumper ROM. The default is jumper ROM not installed. Setting the Timeouts and Interrupt ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The jumpers labeled EXT1 and EXT2 are used to determine the timeout parameters. These two jumpers are normally left open. To select a hardware interrupt level set one (only one!) of the jumpers IRQ2, IRQ3, IRQ4, IRQ5, IRQ7. The Manufacturer's default is IRQ2. Configuring the PC130E for Star or Bus Topology ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The single jumper labeled STAR is used to configure the PC130E board for star or bus topology. When the jumper is installed, the board may be used in a star network, when it is removed, the board can be used in a bus topology. Diagnostic LEDs ^^^^^^^^^^^^^^^ Two diagnostic LEDs are visible on the rear bracket of the board. The green LED monitors the network activity: the red one shows the board activity:: Green | Status Red | Status -------|------------------- ---------|------------------- on | normal activity flash/on | data transfer blink | reconfiguration off | no data transfer; off | defective board or | incorrect memory or | node ID is zero | I/O address PC500/PC550 Longboard (16-bit cards) ------------------------------------ - from Juergen Seifert <seifert@htwm.de> .. note:: There is another Version of the PC500 called Short Version, which is different in hard- and software! The most important differences are: - The long board has no Shared memory. - On the long board the selection of the interrupt is done by binary coded switch, on the short board directly by jumper. [Avery's note: pay special attention to that: the long board HAS NO SHARED MEMORY. This means the current Linux-ARCnet driver can't use these cards. I have obtained a PC500Longboard and will be doing some experiments on it in the future, but don't hold your breath. Thanks again to Juergen Seifert for his advice about this!] This description has been written by Juergen Seifert <seifert@htwm.de> using information from the following Original SMC Manual "Configuration Guide for SMC ARCNET-PC500/PC550 Series Network Controller Boards Pub. # 900.033 Rev. A November, 1989" ARCNET is a registered trademark of the Datapoint Corporation SMC is a registered trademark of the Standard Microsystems Corporation The PC500 is equipped with a standard BNC female connector for connection to RG-62/U coax cable. The board is designed both for point-to-point connection in star networks and for connection to bus networks. The PC550 is equipped with two modular RJ11-type jacks for connection to twisted pair wiring. It can be used in a star or a daisy-chained (BUS) network. :: 1 0 9 8 7 6 5 4 3 2 1 6 5 4 3 2 1 ____________________________________________________________________ < | SW1 | | SW2 | | > |_____________________| |_____________| | < IRQ |I/O Addr | > ___| < CR4 |___| > CR3 |___| < ___| > N | | 8 < o | | 7 > d | S | 6 < e | W | 5 > A | 3 | 4 < d | | 3 > d | | 2 < r |___| 1 > |o| _____| < |o| | J1 | > 3 1 JP6 |_____| < |o|o| JP2 | J2 | > |o|o| |_____| < 4 2__ ______________| > | | | <____| |_____________________________________________| Legend:: SW1 1-6: I/O Base Address Select 7-10: Interrupt Select SW2 1-6: Reserved for Future Use SW3 1-8: Node ID Select JP2 1-4: Extended Timeout Select JP6 Selected - Star Topology (PC500 only) Deselected - Bus Topology (PC500 only) CR3 Green Monitors Network Activity CR4 Red Monitors Board Activity J1 BNC RG62/U Connector (PC500 only) J1 6-position Telephone Jack (PC550 only) J2 6-position Telephone Jack (PC550 only) Setting one of the switches to Off/Open means "1", On/Closed means "0". Setting the Node ID ^^^^^^^^^^^^^^^^^^^ The eight switches in group SW3 are used to set the node ID. Each node attached to the network must have an unique node ID which must be different from 0. Switch 1 serves as the least significant bit (LSB). The node ID is the sum of the values of all switches set to "1" These values are:: Switch | Value -------|------- 1 | 1 2 | 2 3 | 4 4 | 8 5 | 16 6 | 32 7 | 64 8 | 128 Some Examples:: Switch | Hex | Decimal 8 7 6 5 4 3 2 1 | Node ID | Node ID ----------------|---------|--------- 0 0 0 0 0 0 0 0 | not allowed 0 0 0 0 0 0 0 1 | 1 | 1 0 0 0 0 0 0 1 0 | 2 | 2 0 0 0 0 0 0 1 1 | 3 | 3 . . . | | 0 1 0 1 0 1 0 1 | 55 | 85 . . . | | 1 0 1 0 1 0 1 0 | AA | 170 . . . | | 1 1 1 1 1 1 0 1 | FD | 253 1 1 1 1 1 1 1 0 | FE | 254 1 1 1 1 1 1 1 1 | FF | 255 Setting the I/O Base Address ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The first six switches in switch group SW1 are used to select one of 32 possible I/O Base addresses using the following table:: Switch | Hex I/O 6 5 4 3 2 1 | Address -------------|-------- 0 1 0 0 0 0 | 200 0 1 0 0 0 1 | 210 0 1 0 0 1 0 | 220 0 1 0 0 1 1 | 230 0 1 0 1 0 0 | 240 0 1 0 1 0 1 | 250 0 1 0 1 1 0 | 260 0 1 0 1 1 1 | 270 0 1 1 0 0 0 | 280 0 1 1 0 0 1 | 290 0 1 1 0 1 0 | 2A0 0 1 1 0 1 1 | 2B0 0 1 1 1 0 0 | 2C0 0 1 1 1 0 1 | 2D0 0 1 1 1 1 0 | 2E0 (Manufacturer's default) 0 1 1 1 1 1 | 2F0 1 1 0 0 0 0 | 300 1 1 0 0 0 1 | 310 1 1 0 0 1 0 | 320 1 1 0 0 1 1 | 330 1 1 0 1 0 0 | 340 1 1 0 1 0 1 | 350 1 1 0 1 1 0 | 360 1 1 0 1 1 1 | 370 1 1 1 0 0 0 | 380 1 1 1 0 0 1 | 390 1 1 1 0 1 0 | 3A0 1 1 1 0 1 1 | 3B0 1 1 1 1 0 0 | 3C0 1 1 1 1 0 1 | 3D0 1 1 1 1 1 0 | 3E0 1 1 1 1 1 1 | 3F0 Setting the Interrupt ^^^^^^^^^^^^^^^^^^^^^ Switches seven through ten of switch group SW1 are used to select the interrupt level. The interrupt level is binary coded, so selections from 0 to 15 would be possible, but only the following eight values will be supported: 3, 4, 5, 7, 9, 10, 11, 12. :: Switch | IRQ 10 9 8 7 | ---------|-------- 0 0 1 1 | 3 0 1 0 0 | 4 0 1 0 1 | 5 0 1 1 1 | 7 1 0 0 1 | 9 (=2) (default) 1 0 1 0 | 10 1 0 1 1 | 11 1 1 0 0 | 12 Setting the Timeouts ^^^^^^^^^^^^^^^^^^^^ The two jumpers JP2 (1-4) are used to determine the timeout parameters. These two jumpers are normally left open. Refer to the COM9026 Data Sheet for alternate configurations. Configuring the PC500 for Star or Bus Topology ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The single jumper labeled JP6 is used to configure the PC500 board for star or bus topology. When the jumper is installed, the board may be used in a star network, when it is removed, the board can be used in a bus topology. Diagnostic LEDs ^^^^^^^^^^^^^^^ Two diagnostic LEDs are visible on the rear bracket of the board. The green LED monitors the network activity: the red one shows the board activity:: Green | Status Red | Status -------|------------------- ---------|------------------- on | normal activity flash/on | data transfer blink | reconfiguration off | no data transfer; off | defective board or | incorrect memory or | node ID is zero | I/O address PC710 (8-bit card) ------------------ - from J.S. van Oosten <jvoosten@compiler.tdcnet.nl> Note: this data is gathered by experimenting and looking at info of other cards. However, I'm sure I got 99% of the settings right. The SMC710 card resembles the PC270 card, but is much more basic (i.e. no LEDs, RJ11 jacks, etc.) and 8 bit. Here's a little drawing:: _______________________________________ | +---------+ +---------+ |____ | | S2 | | S1 | | | +---------+ +---------+ | | | | +===+ __ | | | R | | | X-tal ###___ | | O | |__| ####__'| | | M | || ### | +===+ | | | | .. JP1 +----------+ | | .. | big chip | | | .. | 90C63 | | | .. | | | | .. +----------+ | ------- ----------- ||||||||||||||||||||| The row of jumpers at JP1 actually consists of 8 jumpers, (sometimes labelled) the same as on the PC270, from top to bottom: EXT2, EXT1, ROM, IRQ7, IRQ5, IRQ4, IRQ3, IRQ2 (gee, wonder what they would do? :-) ) S1 and S2 perform the same function as on the PC270, only their numbers are swapped (S1 is the nodeaddress, S2 sets IO- and RAM-address). I know it works when connected to a PC110 type ARCnet board. ***************************************************************************** Possibly SMC ============ LCS-8830(-T) (8 and 16-bit cards) --------------------------------- - from Mathias Katzer <mkatzer@HRZ.Uni-Bielefeld.DE> - Marek Michalkiewicz <marekm@i17linuxb.ists.pwr.wroc.pl> says the LCS-8830 is slightly different from LCS-8830-T. These are 8 bit, BUS only (the JP0 jumper is hardwired), and BNC only. This is a LCS-8830-T made by SMC, I think ('SMC' only appears on one PLCC, nowhere else, not even on the few Xeroxed sheets from the manual). SMC ARCnet Board Type LCS-8830-T:: ------------------------------------ | | | JP3 88 8 JP2 | | ##### | \ | | ##### ET1 ET2 ###| | 8 ###| | U3 SW 1 JP0 ###| Phone Jacks | -- ###| | | | | | | | SW2 | | | | | | | | ##### | | -- ##### #### BNC Connector | #### | 888888 JP1 | | 234567 | -- ------- ||||||||||||||||||||||||||| -------------------------- SW1: DIP-Switches for Station Address SW2: DIP-Switches for Memory Base and I/O Base addresses JP0: If closed, internal termination on (default open) JP1: IRQ Jumpers JP2: Boot-ROM enabled if closed JP3: Jumpers for response timeout U3: Boot-ROM Socket ET1 ET2 Response Time Idle Time Reconfiguration Time 78 86 840 X 285 316 1680 X 563 624 1680 X X 1130 1237 1680 (X means closed jumper) (DIP-Switch downwards means "0") The station address is binary-coded with SW1. The I/O base address is coded with DIP-Switches 6,7 and 8 of SW2: ======== ======== Switches Base 678 Address ======== ======== 000 260-26f 100 290-29f 010 2e0-2ef 110 2f0-2ff 001 300-30f 101 350-35f 011 380-38f 111 3e0-3ef ======== ======== DIP Switches 1-5 of SW2 encode the RAM and ROM Address Range: ======== ============= ================ Switches RAM ROM 12345 Address Range Address Range ======== ============= ================ 00000 C:0000-C:07ff C:2000-C:3fff 10000 C:0800-C:0fff 01000 C:1000-C:17ff 11000 C:1800-C:1fff 00100 C:4000-C:47ff C:6000-C:7fff 10100 C:4800-C:4fff 01100 C:5000-C:57ff 11100 C:5800-C:5fff 00010 C:C000-C:C7ff C:E000-C:ffff 10010 C:C800-C:Cfff 01010 C:D000-C:D7ff 11010 C:D800-C:Dfff 00110 D:0000-D:07ff D:2000-D:3fff 10110 D:0800-D:0fff 01110 D:1000-D:17ff 11110 D:1800-D:1fff 00001 D:4000-D:47ff D:6000-D:7fff 10001 D:4800-D:4fff 01001 D:5000-D:57ff 11001 D:5800-D:5fff 00101 D:8000-D:87ff D:A000-D:bfff 10101 D:8800-D:8fff 01101 D:9000-D:97ff 11101 D:9800-D:9fff 00011 D:C000-D:c7ff D:E000-D:ffff 10011 D:C800-D:cfff 01011 D:D000-D:d7ff 11011 D:D800-D:dfff 00111 E:0000-E:07ff E:2000-E:3fff 10111 E:0800-E:0fff 01111 E:1000-E:17ff 11111 E:1800-E:1fff ======== ============= ================ PureData Corp ============= PDI507 (8-bit card) -------------------- - from Mark Rejhon <mdrejhon@magi.com> (slight modifications by Avery) - Avery's note: I think PDI508 cards (but definitely NOT PDI508Plus cards) are mostly the same as this. PDI508Plus cards appear to be mainly software-configured. Jumpers: There is a jumper array at the bottom of the card, near the edge connector. This array is labelled J1. They control the IRQs and something else. Put only one jumper on the IRQ pins. ETS1, ETS2 are for timing on very long distance networks. See the more general information near the top of this file. There is a J2 jumper on two pins. A jumper should be put on them, since it was already there when I got the card. I don't know what this jumper is for though. There is a two-jumper array for J3. I don't know what it is for, but there were already two jumpers on it when I got the card. It's a six pin grid in a two-by-three fashion. The jumpers were configured as follows:: .-------. o | o o | :-------: ------> Accessible end of card with connectors o | o o | in this direction -------> `-------' Carl de Billy <CARL@carainfo.com> explains J3 and J4: J3 Diagram:: .-------. o | o o | :-------: TWIST Technology o | o o | `-------' .-------. | o o | o :-------: COAX Technology | o o | o `-------' - If using coax cable in a bus topology the J4 jumper must be removed; place it on one pin. - If using bus topology with twisted pair wiring move the J3 jumpers so they connect the middle pin and the pins closest to the RJ11 Connectors. Also the J4 jumper must be removed; place it on one pin of J4 jumper for storage. - If using star topology with twisted pair wiring move the J3 jumpers so they connect the middle pin and the pins closest to the RJ11 connectors. DIP Switches: The DIP switches accessible on the accessible end of the card while it is installed, is used to set the ARCnet address. There are 8 switches. Use an address from 1 to 254 ========== ========================= Switch No. ARCnet address 12345678 ========== ========================= 00000000 FF (Don't use this!) 00000001 FE 00000010 FD ... 11111101 2 11111110 1 11111111 0 (Don't use this!) ========== ========================= There is another array of eight DIP switches at the top of the card. There are five labelled MS0-MS4 which seem to control the memory address, and another three labelled IO0-IO2 which seem to control the base I/O address of the card. This was difficult to test by trial and error, and the I/O addresses are in a weird order. This was tested by setting the DIP switches, rebooting the computer, and attempting to load ARCETHER at various addresses (mostly between 0x200 and 0x400). The address that caused the red transmit LED to blink, is the one that I thought works. Also, the address 0x3D0 seem to have a special meaning, since the ARCETHER packet driver loaded fine, but without the red LED blinking. I don't know what 0x3D0 is for though. I recommend using an address of 0x300 since Windows may not like addresses below 0x300. ============= =========== IO Switch No. I/O address 210 ============= =========== 111 0x260 110 0x290 101 0x2E0 100 0x2F0 011 0x300 010 0x350 001 0x380 000 0x3E0 ============= =========== The memory switches set a reserved address space of 0x1000 bytes (0x100 segment units, or 4k). For example if I set an address of 0xD000, it will use up addresses 0xD000 to 0xD100. The memory switches were tested by booting using QEMM386 stealth, and using LOADHI to see what address automatically became excluded from the upper memory regions, and then attempting to load ARCETHER using these addresses. I recommend using an ARCnet memory address of 0xD000, and putting the EMS page frame at 0xC000 while using QEMM stealth mode. That way, you get contiguous high memory from 0xD100 almost all the way the end of the megabyte. Memory Switch 0 (MS0) didn't seem to work properly when set to OFF on my card. It could be malfunctioning on my card. Experiment with it ON first, and if it doesn't work, set it to OFF. (It may be a modifier for the 0x200 bit?) ============= ============================================ MS Switch No. 43210 Memory address ============= ============================================ 00001 0xE100 (guessed - was not detected by QEMM) 00011 0xE000 (guessed - was not detected by QEMM) 00101 0xDD00 00111 0xDC00 01001 0xD900 01011 0xD800 01101 0xD500 01111 0xD400 10001 0xD100 10011 0xD000 10101 0xCD00 10111 0xCC00 11001 0xC900 (guessed - crashes tested system) 11011 0xC800 (guessed - crashes tested system) 11101 0xC500 (guessed - crashes tested system) 11111 0xC400 (guessed - crashes tested system) ============= ============================================ CNet Technology Inc. (8-bit cards) ================================== 120 Series (8-bit cards) ------------------------ - from Juergen Seifert <seifert@htwm.de> This description has been written by Juergen Seifert <seifert@htwm.de> using information from the following Original CNet Manual "ARCNET USER'S MANUAL for CN120A CN120AB CN120TP CN120ST CN120SBT P/N:12-01-0007 Revision 3.00" ARCNET is a registered trademark of the Datapoint Corporation - P/N 120A ARCNET 8 bit XT/AT Star - P/N 120AB ARCNET 8 bit XT/AT Bus - P/N 120TP ARCNET 8 bit XT/AT Twisted Pair - P/N 120ST ARCNET 8 bit XT/AT Star, Twisted Pair - P/N 120SBT ARCNET 8 bit XT/AT Star, Bus, Twisted Pair :: __________________________________________________________________ | | | ___| | LED |___| | ___| | N | | ID7 | o | | ID6 | d | S | ID5 | e | W | ID4 | ___________________ A | 2 | ID3 | | | d | | ID2 | | | 1 2 3 4 5 6 7 8 d | | ID1 | | | _________________ r |___| ID0 | | 90C65 || SW1 | ____| | JP 8 7 | ||_________________| | | | |o|o| JP1 | | | J2 | | |o|o| |oo| | | JP 1 1 1 | | | ______________ | | 0 1 2 |____| | | PROM | |___________________| |o|o|o| _____| | > SOCKET | JP 6 5 4 3 2 |o|o|o| | J1 | | |______________| |o|o|o|o|o| |o|o|o| |_____| |_____ |o|o|o|o|o| ______________| | | |_____________________________________________| Legend:: 90C65 ARCNET Probe S1 1-5: Base Memory Address Select 6-8: Base I/O Address Select S2 1-8: Node ID Select (ID0-ID7) JP1 ROM Enable Select JP2 IRQ2 JP3 IRQ3 JP4 IRQ4 JP5 IRQ5 JP6 IRQ7 JP7/JP8 ET1, ET2 Timeout Parameters JP10/JP11 Coax / Twisted Pair Select (CN120ST/SBT only) JP12 Terminator Select (CN120AB/ST/SBT only) J1 BNC RG62/U Connector (all except CN120TP) J2 Two 6-position Telephone Jack (CN120TP/ST/SBT only) Setting one of the switches to Off means "1", On means "0". Setting the Node ID ^^^^^^^^^^^^^^^^^^^ The eight switches in SW2 are used to set the node ID. Each node attached to the network must have an unique node ID which must be different from 0. Switch 1 (ID0) serves as the least significant bit (LSB). The node ID is the sum of the values of all switches set to "1" These values are: ======= ====== ===== Switch Label Value ======= ====== ===== 1 ID0 1 2 ID1 2 3 ID2 4 4 ID3 8 5 ID4 16 6 ID5 32 7 ID6 64 8 ID7 128 ======= ====== ===== Some Examples:: Switch | Hex | Decimal 8 7 6 5 4 3 2 1 | Node ID | Node ID ----------------|---------|--------- 0 0 0 0 0 0 0 0 | not allowed 0 0 0 0 0 0 0 1 | 1 | 1 0 0 0 0 0 0 1 0 | 2 | 2 0 0 0 0 0 0 1 1 | 3 | 3 . . . | | 0 1 0 1 0 1 0 1 | 55 | 85 . . . | | 1 0 1 0 1 0 1 0 | AA | 170 . . . | | 1 1 1 1 1 1 0 1 | FD | 253 1 1 1 1 1 1 1 0 | FE | 254 1 1 1 1 1 1 1 1 | FF | 255 Setting the I/O Base Address ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The last three switches in switch block SW1 are used to select one of eight possible I/O Base addresses using the following table:: Switch | Hex I/O 6 7 8 | Address ------------|-------- ON ON ON | 260 OFF ON ON | 290 ON OFF ON | 2E0 (Manufacturer's default) OFF OFF ON | 2F0 ON ON OFF | 300 OFF ON OFF | 350 ON OFF OFF | 380 OFF OFF OFF | 3E0 Setting the Base Memory (RAM) buffer Address ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The memory buffer (RAM) requires 2K. The base of this buffer can be located in any of eight positions. The address of the Boot Prom is memory base + 8K or memory base + 0x2000. Switches 1-5 of switch block SW1 select the Memory Base address. :: Switch | Hex RAM | Hex ROM 1 2 3 4 5 | Address | Address *) --------------------|---------|----------- ON ON ON ON ON | C0000 | C2000 ON ON OFF ON ON | C4000 | C6000 ON ON ON OFF ON | CC000 | CE000 ON ON OFF OFF ON | D0000 | D2000 (Manufacturer's default) ON ON ON ON OFF | D4000 | D6000 ON ON OFF ON OFF | D8000 | DA000 ON ON ON OFF OFF | DC000 | DE000 ON ON OFF OFF OFF | E0000 | E2000 *) To enable the Boot ROM install the jumper JP1 .. note:: Since the switches 1 and 2 are always set to ON it may be possible that they can be used to add an offset of 2K, 4K or 6K to the base address, but this feature is not documented in the manual and I haven't tested it yet. Setting the Interrupt Line ^^^^^^^^^^^^^^^^^^^^^^^^^^ To select a hardware interrupt level install one (only one!) of the jumpers JP2, JP3, JP4, JP5, JP6. JP2 is the default:: Jumper | IRQ -------|----- 2 | 2 3 | 3 4 | 4 5 | 5 6 | 7 Setting the Internal Terminator on CN120AB/TP/SBT ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The jumper JP12 is used to enable the internal terminator:: ----- 0 | 0 | ----- ON | | ON | 0 | | 0 | | | OFF ----- OFF | 0 | 0 ----- Terminator Terminator disabled enabled Selecting the Connector Type on CN120ST/SBT ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ :: JP10 JP11 JP10 JP11 ----- ----- 0 0 | 0 | | 0 | ----- ----- | | | | | 0 | | 0 | | 0 | | 0 | | | | | ----- ----- | 0 | | 0 | 0 0 ----- ----- Coaxial Cable Twisted Pair Cable (Default) Setting the Timeout Parameters ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The jumpers labeled EXT1 and EXT2 are used to determine the timeout parameters. These two jumpers are normally left open. CNet Technology Inc. (16-bit cards) =================================== 160 Series (16-bit cards) ------------------------- - from Juergen Seifert <seifert@htwm.de> This description has been written by Juergen Seifert <seifert@htwm.de> using information from the following Original CNet Manual "ARCNET USER'S MANUAL for CN160A CN160AB CN160TP P/N:12-01-0006 Revision 3.00" ARCNET is a registered trademark of the Datapoint Corporation - P/N 160A ARCNET 16 bit XT/AT Star - P/N 160AB ARCNET 16 bit XT/AT Bus - P/N 160TP ARCNET 16 bit XT/AT Twisted Pair :: ___________________________________________________________________ < _________________________ ___| > |oo| JP2 | | LED |___| < |oo| JP1 | 9026 | LED |___| > |_________________________| ___| < N | | ID7 > 1 o | | ID6 < 1 2 3 4 5 6 7 8 9 0 d | S | ID5 > _______________ _____________________ e | W | ID4 < | PROM | | SW1 | A | 2 | ID3 > > SOCKET | |_____________________| d | | ID2 < |_______________| | IO-Base | MEM | d | | ID1 > r |___| ID0 < ____| > | | < | J1 | > | | < |____| > 1 1 1 1 | < 3 4 5 6 7 JP 8 9 0 1 2 3 | > |o|o|o|o|o| |o|o|o|o|o|o| | < |o|o|o|o|o| __ |o|o|o|o|o|o| ___________| > | | | <____________| |_______________________________________| Legend:: 9026 ARCNET Probe SW1 1-6: Base I/O Address Select 7-10: Base Memory Address Select SW2 1-8: Node ID Select (ID0-ID7) JP1/JP2 ET1, ET2 Timeout Parameters JP3-JP13 Interrupt Select J1 BNC RG62/U Connector (CN160A/AB only) J1 Two 6-position Telephone Jack (CN160TP only) LED Setting one of the switches to Off means "1", On means "0". Setting the Node ID ^^^^^^^^^^^^^^^^^^^ The eight switches in SW2 are used to set the node ID. Each node attached to the network must have an unique node ID which must be different from 0. Switch 1 (ID0) serves as the least significant bit (LSB). The node ID is the sum of the values of all switches set to "1" These values are:: Switch | Label | Value -------|-------|------- 1 | ID0 | 1 2 | ID1 | 2 3 | ID2 | 4 4 | ID3 | 8 5 | ID4 | 16 6 | ID5 | 32 7 | ID6 | 64 8 | ID7 | 128 Some Examples:: Switch | Hex | Decimal 8 7 6 5 4 3 2 1 | Node ID | Node ID ----------------|---------|--------- 0 0 0 0 0 0 0 0 | not allowed 0 0 0 0 0 0 0 1 | 1 | 1 0 0 0 0 0 0 1 0 | 2 | 2 0 0 0 0 0 0 1 1 | 3 | 3 . . . | | 0 1 0 1 0 1 0 1 | 55 | 85 . . . | | 1 0 1 0 1 0 1 0 | AA | 170 . . . | | 1 1 1 1 1 1 0 1 | FD | 253 1 1 1 1 1 1 1 0 | FE | 254 1 1 1 1 1 1 1 1 | FF | 255 Setting the I/O Base Address ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The first six switches in switch block SW1 are used to select the I/O Base address using the following table:: Switch | Hex I/O 1 2 3 4 5 6 | Address ------------------------|-------- OFF ON ON OFF OFF ON | 260 OFF ON OFF ON ON OFF | 290 OFF ON OFF OFF OFF ON | 2E0 (Manufacturer's default) OFF ON OFF OFF OFF OFF | 2F0 OFF OFF ON ON ON ON | 300 OFF OFF ON OFF ON OFF | 350 OFF OFF OFF ON ON ON | 380 OFF OFF OFF OFF OFF ON | 3E0 Note: Other IO-Base addresses seem to be selectable, but only the above combinations are documented. Setting the Base Memory (RAM) buffer Address ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The switches 7-10 of switch block SW1 are used to select the Memory Base address of the RAM (2K) and the PROM:: Switch | Hex RAM | Hex ROM 7 8 9 10 | Address | Address ----------------|---------|----------- OFF OFF ON ON | C0000 | C8000 OFF OFF ON OFF | D0000 | D8000 (Default) OFF OFF OFF ON | E0000 | E8000 .. note:: Other MEM-Base addresses seem to be selectable, but only the above combinations are documented. Setting the Interrupt Line ^^^^^^^^^^^^^^^^^^^^^^^^^^ To select a hardware interrupt level install one (only one!) of the jumpers JP3 through JP13 using the following table:: Jumper | IRQ -------|----------------- 3 | 14 4 | 15 5 | 12 6 | 11 7 | 10 8 | 3 9 | 4 10 | 5 11 | 6 12 | 7 13 | 2 (=9) Default! .. note:: - Do not use JP11=IRQ6, it may conflict with your Floppy Disk Controller - Use JP3=IRQ14 only, if you don't have an IDE-, MFM-, or RLL- Hard Disk, it may conflict with their controllers Setting the Timeout Parameters ------------------------------ The jumpers labeled JP1 and JP2 are used to determine the timeout parameters. These two jumpers are normally left open. Lantech ======= 8-bit card, unknown model ------------------------- - from Vlad Lungu <vlungu@ugal.ro> - his e-mail address seemed broken at the time I tried to reach him. Sorry Vlad, if you didn't get my reply. :: ________________________________________________________________ | 1 8 | | ___________ __| | | SW1 | LED |__| | |__________| | | ___| | _____________________ |S | 8 | | | |W | | | | |2 | | | | |__| 1 | | UM9065L | |o| JP4 ____|____ | | | |o| | CN | | | | |________| | | | | | |___________________| | | | | | | _____________ | | | | | | | PROM | |ooooo| JP6 | | |____________| |ooooo| | |_____________ _ _| |____________________________________________| |__| UM9065L : ARCnet Controller SW 1 : Shared Memory Address and I/O Base :: ON=0 12345|Memory Address -----|-------------- 00001| D4000 00010| CC000 00110| D0000 01110| D1000 01101| D9000 10010| CC800 10011| DC800 11110| D1800 It seems that the bits are considered in reverse order. Also, you must observe that some of those addresses are unusual and I didn't probe them; I used a memory dump in DOS to identify them. For the 00000 configuration and some others that I didn't write here the card seems to conflict with the video card (an S3 GENDAC). I leave the full decoding of those addresses to you. :: 678| I/O Address ---|------------ 000| 260 001| failed probe 010| 2E0 011| 380 100| 290 101| 350 110| failed probe 111| 3E0 SW 2 : Node ID (binary coded) JP 4 : Boot PROM enable CLOSE - enabled OPEN - disabled JP 6 : IRQ set (ONLY ONE jumper on 1-5 for IRQ 2-6) Acer ==== 8-bit card, Model 5210-003 -------------------------- - from Vojtech Pavlik <vojtech@suse.cz> using portions of the existing arcnet-hardware file. This is a 90C26 based card. Its configuration seems similar to the SMC PC100, but has some additional jumpers I don't know the meaning of. :: __ | | ___________|__|_________________________ | | | | | | BNC | | | |______| ___| | _____________________ |___ | | | | | | Hybrid IC | | | | | o|o J1 | | |_____________________| 8|8 | | 8|8 J5 | | o|o | | 8|8 | |__ 8|8 | (|__| LED o|o | | 8|8 | | 8|8 J15 | | | | _____ | | | | _____ | | | | | | ___| | | | | | | | _____ | ROM | | UFS | | | | | | | | | | | | | ___ | | | | | | | | | | |__.__| |__.__| | | | NCR | |XTL| _____ _____ | | | | |___| | | | | | | |90C26| | | | | | | | | | RAM | | UFS | | | | | J17 o|o | | | | | | | | J16 o|o | | | | | | |__.__| |__.__| |__.__| | | ___ | | | |8 | | |SW2| | | | | | | |___|1 | | ___ | | | |10 J18 o|o | | | | o|o | | |SW1| o|o | | | | J21 o|o | | |___|1 | | | |____________________________________| Legend:: 90C26 ARCNET Chip XTL 20 MHz Crystal SW1 1-6 Base I/O Address Select 7-10 Memory Address Select SW2 1-8 Node ID Select (ID0-ID7) J1-J5 IRQ Select J6-J21 Unknown (Probably extra timeouts & ROM enable ...) LED1 Activity LED BNC Coax connector (STAR ARCnet) RAM 2k of SRAM ROM Boot ROM socket UFS Unidentified Flying Sockets Setting the Node ID ^^^^^^^^^^^^^^^^^^^ The eight switches in SW2 are used to set the node ID. Each node attached to the network must have an unique node ID which must not be 0. Switch 1 (ID0) serves as the least significant bit (LSB). Setting one of the switches to OFF means "1", ON means "0". The node ID is the sum of the values of all switches set to "1" These values are:: Switch | Value -------|------- 1 | 1 2 | 2 3 | 4 4 | 8 5 | 16 6 | 32 7 | 64 8 | 128 Don't set this to 0 or 255; these values are reserved. Setting the I/O Base Address ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The switches 1 to 6 of switch block SW1 are used to select one of 32 possible I/O Base addresses using the following tables:: | Hex Switch | Value -------|------- 1 | 200 2 | 100 3 | 80 4 | 40 --> -------------------- --> maximum size reached --> -------------------- [ Konzepte0.43Was zu einem Entwurf gehört Wie die Entwicklung von Software durchgeführt wird ] |
2026-04-04